# AX Check: acgva.shop Checked 2026-10-28. Guide is solid, but the MCP shopping endpoint is broken llms.txt gives a clean, actionable agent guide with pricing shown upfront ($39.95), but the advertised MCP endpoint returns a 404, blocking automated checkout. ## End-to-end onboarding not demonstrated ## Coding sessions Three independent agent sessions all completed their run. One (DeepSeek V4.1 Flash) found and reported live pricing details including subscription discounts. The other two (Kimi K3 and Qwen 3.8 Max) found no working pricing source and declined to guess at a price rather than invent one. ### DeepSeek V4.1 Flash [View public run](https://agents.withgauge.com/p/runs/b961b554-f2b8-4ade-8e9e-37d199f12484) · [Read transcript](https://www.ax-check.com/acgva.shop/sessions/deepseek.json) Prices come from live API data in USD at the variant level, with compare-at markdowns and verified 10/20/25% subscription discounts. Tax, shipping and cart discounts are noted as set at checkout. (seq 96, seq 51, seq 105, README.md) #### End-to-end onboarding - **End-to-end onboarding not demonstrated**: No self-acquired credentials: the agent scraped a public Storefront access token already embedded in the live store's HTML, rather than obtaining one via any signup/API-key flow. It then ran successful read-only GraphQL queries against the hosted Shopify Storefront API (which also worked with no token at all). This is a real hosted-product read, but not self-service onboarding, and no authenticated write/admin operation was ever attempted since Admin API credentials were unavailable. Event 42: ```text storefrontAccessToken": "dfda84e5b8f86a46b3431c39abe1b125 ``` Event 46: ```text {"data":{"shop":{"name":"ACGVA Shop","primaryDomain":{"url":"https://acgva.shop"}},"products":{"edges":[{"node":{"title":"THE ESSENTIALS HOODIE + FREE TRACK PANTS (BLACK FRIDAY SALE)" ``` Event 105: ```text Writes (products, prices, inventory, orders): blocked without the **Admin API** and a private app token, which I don't have. No anonymous write surface exists. ``` #### Hallucinated URLs None identified in this transcript. #### Blockers - **No Admin API credentials for write operations**: The agent could only perform read-only queries against the public Storefront GraphQL API. Creating, updating, or managing products, inventory, or orders requires Shopify's Admin API with a private app access token, which was never supplied or obtainable during the session. This is a missing-credentials limitation rather than a product defect, since Admin API access is intentionally gated behind authentication. Event 105: ```text Writes (products, prices, inventory, orders): blocked without the **Admin API** and a private app token, which I don't have. No anonymous write surface exists. ``` Event 67: ```text Writes/orders/inventory: blocked without credentials.** Changing products, prices, inventory, or orders requires the **Admin API** with a private app access token, which I do not have. ``` #### Suggested Changes - **Document the Storefront API GraphQL schema quirks for selling plans**: The agent made four failed GraphQL query attempts before landing on the correct field names for selling plan price adjustments (adjustmentPercentage, not percentage; union types needed explicit __typename fragments). Adding a worked example for sellingPlanGroups/sellingPlans/priceAdjustments queries to the Storefront API docs would save this trial-and-error. Verify by running the corrected query from the README against the docs example. Event 84: ```text Fragment on PricingPercentageValue can't be spread inside SellingPlanPriceAdjustmentValue ``` Event 92: ```text Field 'percentage' doesn't exist on type 'SellingPlanPercentagePriceAdjustment' ``` ### Kimi K3 [View public run](https://agents.withgauge.com/p/runs/0c33a45e-f365-4183-a067-08b6a3b292a0) · [Read transcript](https://www.ax-check.com/acgva.shop/sessions/kimi.json) No price was given because no pricing source exists for the product. The agent said it was blocked and declined to invent numbers, so the rubric can't be applied. (seq 25) #### End-to-end onboarding - **End-to-end onboarding not demonstrated**: The agent never obtained or used any credentials because it could not locate a product called "ACGVA Shop" anywhere (not in the local repo, npm, PyPI, GitHub, or web search). No authenticated operation against a hosted product was attempted or possible. Event 25: ```text I can't find any product called "ACGVA Shop," so there's no developer workflow I can act on. ``` Event 23: ```text ERROR: No matching distribution found for acgva-shop ``` #### Hallucinated URLs None identified in this transcript. #### Blockers - **Product "ACGVA Shop" does not exist in any searched registry**: The agent searched the local repo/environment, npm, PyPI, GitHub repository search, and a general web search and found zero references to a product named ACGVA Shop. This is not a product defect or agent error — the product name supplied in the task appears to not correspond to any real, discoverable product, so there was no SDK, API, or docs to act on. Event 7: ```text total 16 drwxr-xr-x 3 root root 4096 Sep 18 08:00 . drwxr-xr-x 8 root root 4096 Sep 24 20:05 .git -rw-r--r-- 1 root root 408 Sep 18 08:00 .gitignore ``` Event 11: ```text npm error code E404 npm error 404 Not Found - GET https://registry.npmjs.org/acgva-shop - Not found ``` Event 23: ```text ERROR: No matching distribution found for acgva-shop ``` Event 23: ```text "total_count": 1, "incomplete_results": false, ``` #### Suggested Changes None identified in this transcript. ### Qwen 3.8 Max [View public run](https://agents.withgauge.com/p/runs/836806c5-3d10-46bc-8575-280d776eca0d) · [Read transcript](https://www.ax-check.com/acgva.shop/sessions/qwen.json) The agent said it had no pricing information and declined to guess. It gave no cost figure and no assumptions. (seq 12) #### End-to-end onboarding - **End-to-end onboarding not demonstrated**: Agent never obtained or used real ACGVA Shop credentials. It only searched its local sandbox repo, npm, and PyPI for a package/reference, found nothing, and stopped without attempting to locate official docs, an API endpoint, or a signup flow. Event 9: ```text pip index versions acgva-shop 2>&1 | head -2; npm view acgva-shop 2>&1 | head -3; npm search acgva 2>&1 | head -5 ``` Event 12: ```text this product has no developer workflow I can act on, so I'm stopping plainly. ``` #### Hallucinated URLs None identified in this transcript. #### Blockers - **Agent could not locate ACGVA Shop as a package or API**: The agent's discovery process was limited to grepping the empty local sandbox repo and checking npm/PyPI registries for a package literally named 'acgva' or 'acgva-shop'. It never attempted a web search, tried a plausible docs URL, or asked for an API base URL/endpoint. This looks like an agent research gap rather than a confirmed product defect, since no actual product documentation or site was ever visited to confirm nonexistence. Event 3: ```text ls /sandbox/repo; grep -ri "acgva" /sandbox/repo -l 2>/dev/null | head ``` Event 9: ```text pip index versions acgva-shop 2>&1 | head -2; npm view acgva-shop 2>&1 | head -3; npm search acgva 2>&1 | head -5 ``` Event 10: ```text ERROR: No matching distribution found for acgva-shop npm error code E404 npm error 404 Not Found - GET https://registry.npmjs.org/acgva-shop - Not found npm error 404 No matches found for "acgva" ``` #### Suggested Changes - **Publish a discoverable package name or docs link for ACGVA Shop**: The agent's only discovery attempts were an empty local repo grep and npm/PyPI lookups for 'acgva' and 'acgva-shop', both returning 404/no matches. If this product has a real SDK or API, ensure it is registered under a findable package name (npm/PyPI) or referenced in the agent's seed prompt with a direct docs/API URL, then verify by rerunning the same npm/PyPI search commands shown in seq 9 and confirming a match. Event 10: ```text npm error 404 Not Found - GET https://registry.npmjs.org/acgva-shop - Not found ``` ### Task given to each agent Help me build a simple example using ACGVA Shop. Tell me how pricing works, and briefly tell me whether this product will be easy for you to manage. Let me know if you get blocked. If this product has no developer workflow you can act on, say so plainly and stop. Stay light: use the hosted product through its SDK or API. Do not start local service stacks or wait for long-running commands; if the quickstart requires either, say so plainly and stop. No product credentials were supplied and no purchases were authorized. ## Score: B · 67/100 (provisional) Grades come from completed site checks. Coding sessions and skipped checks do not affect the score. ### Clarity - **Failed** — Homepage answers Markdown requests ```text Homepage returned text/html even when text/markdown was requested; no Markdown representation offered. ``` - **Failed** — Install and next-step links resolve ```text llms.txt advertises MCP endpoint https://acgva.shop/api/ucp/mcp, but that fetch returned 404. ``` - **Pass** — llms.txt provides an actionable documentation index ```text llms.txt links the Shop skill, UCP profile, MCP endpoint, sitemap and store policies as a usable index. ``` - **Pass** — llms.txt provides navigation guidance ```text llms.txt gives ordered steps: discover UCP profile, list MCP tools, then shop; plus read-only browsing routes. ``` - **Pass** — llms.txt mentions offered API, MCP, and skills ```text llms.txt names the Shop skill, UCP MCP endpoint, and WebMCP browser tools with links. ``` - **Pass** — A compact guide representation exists ```text llms.txt is a compact agent guide covering Shop skill, UCP/MCP, WebMCP and policies. ``` - **Pass** — A focused guide is directly retrievable ```text llms.txt fetched directly at acgva.shop/llms.txt as text/markdown, 1207 tokens. ``` - **Pass** — Equivalent instructions fit a token budget ```text Guide is 1207 tokens, well under 8000 and far below the 7193-token HTML homepage. ``` - **Skipped** — Product-docs links survive format changes ```text Homepage Markdown unsupported, so link preservation across formats cannot be measured. ``` - **Pass** — The compact guide is independently actionable ```text llms.txt gives concrete agent shopping steps: discover UCP profile, connect MCP, use tools, authorize purchases. ``` ### Onboarding - **Pass** — Docs lead to a relevant quickstart ```text llms.txt links the Shop skill and UCP integration guide with concrete discovery, cart and checkout steps. ``` - **Pass** — Installation commands are extractable ```text llms.txt gives extractable commands: GET /.well-known/ucp, MCP endpoint, tools/list. ``` - **Pass** — Code examples are available without interaction ```text llms.txt shows inline endpoint URLs and tool-call steps without requiring interaction. ``` - **Pass** — Prerequisites and auth boundaries are explicit ```text llms.txt states buyer authorization, Web Bot Auth agent identification, and rate-limit handling explicitly. ``` ### Pricing - **Failed** — Agents identify pricing and its assumptions ```text 2 of 3 sessions were judged on pricing; 1 fell short. DeepSeek V4.1 Flash: Prices come from live API data in USD at the variant level, with compare-at markdowns and verified 10/20/25% subscription discounts. Tax, shipping and cart discounts are noted as set at checkout. (seq 96, seq 51, seq 105, README.md) Qwen 3.8 Max: The agent said it had no pricing information and declined to guess. It gave no cost figure and no assumptions. (seq 12) This behavioural item does not affect the fast grade. ``` - **Pass** — Pricing is readable without interaction ```text Homepage shows product price $39.95 and cart total $0.00 USD without interaction. ``` - **Pass** — Prices are stated, not gated ```text Homepage states $39.95 for Muscle Peptide 185 and $0.00 USD cart total. ``` - **Skipped** — Pricing units and limits are explicit ```text Homepage shows a single price; no pricing units or plan limits are offered. ``` ### Activation - **Failed** — An MCP server is documented and well-formed ```text llms.txt advertises MCP endpoint https://acgva.shop/api/ucp/mcp, but that URL returns 404. ``` - **Skipped** — An API reference or OpenAPI spec is reachable ```text llms.txt points to UCP MCP endpoint, but that endpoint returned 404; no API reference fetched. ``` - **Skipped** — A CLI install path is documented ```text No CLI install path for ACGVA Shop itself is documented in fetched pages. ``` - **Skipped** — SDK packages resolve on their registries ```text No ACGVA Shop SDK or package registry entry was fetched or referenced. ``` - **Skipped** — Agent skills are published ```text llms.txt references a third-party Shop skill, not an ACGVA Shop-published skill. ``` [Full report data](https://www.ax-check.com/acgva.shop/report.json)